calraezaj2020
10.10.2019 •
Mathematics
If y=2x^2-4x-5, what is the value of y when x = -3?
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Ответ:
substitute x = -3 to the equation
y = 2 · (-3)² - 4 · (-3) - 5 = 2 · 9 + 12 - 5 = 18 + 12 - 5 = 30 - 5 = 25
y = 25
Ответ: